1 definition found laytonville - U.S. Gazetteer (1990) : Laytonville, CA (CDP, FIPS 40928) Location: 39.67468 N, 123.49522 W Population (1990): 1133 (485 housing units) Area: 13.1 sq km (land), 0.2 sq km (water) Zip code(s): 95454